star formation within h-ii regions of messier 106
TRANSCRIPT
Star Formation within H-II Regions of
Messier 106BY ZOE ZONTOS
Introduction• Messier 106 (NGC 4258)• Constellation: Canes Venatici• RA: 12h 18m 57s | Dec: +47 deg 18’ 13”• Apparent mag: 8.4
H-II Regions
What are H-II regions?
- Low-density clouds of ionized gas.
- Contain ionized atomic hydrogen and are called H-II (where as H-I regions are neutral atomic hydrogen).
H-II Regions (Continued)• Dominant spectral line for H-II regions has a wavelength
of 656.3 m known as the H-alpha line.• Measuring the Hα luminosity emitted by the ionized gas.• Found in nebulae, star clusters, and galaxies (usually
spirals and irregular).
Project Goals (Initially and Revised)• Observe 4-5 galaxies • Compare H-II regions and star formation rates
• Objects observed: • Messier 106
Data Collection and Reduction• Instrument: STX-16803 SBIG• Telescope: ERAU RC 1-m• Main filters used: Hα and r• Exposure times: 1-5 min, 20 min
ResultsHα Filter
ResultsR Filter
Ongoing Results
- Align my r and Hα images- Determining the flux and magnitudes for the regions- Take flux ratios- Use ‘phot’ command- Combine separate filter images
Problems
- Not enough data
- Use of filters
- Weather
- R and Hα lines overlapping
Questions?